Electric plug socket



AEE@ w 9 @CEE y Mm@ M. PROPP ELECTRIC PLUG SOCKET I r Filed Eebll 11 19221 INVENTOR M ATTORNEY electrical plug sockets.

MORRIS PROBE, OF NEW irons, it. Y.

ELECTRG PLUG SQCKET. l

Application led February 11, 1924. Serial No. 691,923.

rlthis invention relates to improvements in More particularly, it is directed to multiple electrical sockets adapted for making connection with a plurality of electrical appliances or devices.

Among the objects of the invention is the provision of a multiple socket of the char- ,acter described adapted for both the screw and knife blade types of electrical connection so as to permit the use with a single plug socket unit of a number of`connectors of either of the types mentioned, and which shall be simple and durable in construction and ethcient in operation to a high degree.

Other features of the invention reside in the novel manner of connecting the various sockets to the plug by the least possible number of parts and also in the construction of the sectional shell enclosing the various parts f formed of insulating material and provided with suitable integral projections by means of which the movable contact elements are spaced and insulated.

Other objects of the invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exempliiied in the construction hereinafter described and the scope of the application will be indicated in the following claims. In the accompanying drawings forming a part of this specification illustrating one embodiment of this invention,

j 1g. 1 is a vertical sectional view through the shell, parts of the interior be-ing broken away in section; ig. 2 is a section on line 2-2 of Fig. l;

Fig. 3 is a sectional view on line 3-3 of Fig. 1; and

Fig. 4 is a partial perspectiveview of the screw shell socket portions of the device.

The main elements of the present invention are connected to and supported by a plug 1 made of suitable insulating material and provided with` the central Contact 2. rilhe contact 2 comprises a'screw `member 2', the shank of which is threaded andprojects through a central bore in the plug, and the conical washer plate 3, the latter being held in position in a suitable recess'by means of the head of the screw. It will be noted that the threaded shank extends through and well below the plug body.

A. threaded brass shell e which forms the outer` Contact encloses the point spaced from vided with. a series wardly against the -lateral extensions 5-5 through which contact is made with the two sockets 6 and 7 as will hereinafter more clearly appear.

Extending from said plug 1 are screw shell sockets 6 and 7 adapted to receive the 65 usual screw plug and being formed with integral radiating extensions 8 and 8 which are riveted or otherwise secured together to y permit' an adjustable joint. At diametrically. opposite points to the extensions 8 and 70 8" are the elongated integral'extensions 9 and 9 which are fastened at their extremities to the extensions 5, 5 of the shell 4f. By the foregoing arrangement of parts an assembly is provided including a plug and two sockets, the shell fromthe plug being in circuit with the two screw sockets and forming a common terminal therewith.

The central contacts for the sockets 6 and Y are formed by means of the Contact bar 10 80 supported by the contact 'screw 2 through the medium of the element 11. The element l1 which is the directsupporting means Jor the contact bar 10 includes the intermediate portion 12 and the arms 14 and 15 project-ing 85 inthe same direction at right angles thereto. The upper arm-14 is provided with a threaded perforation 16 through whichgthe screw 2 passes and by means of which the support 11 is positioned, it being obvious that the 9o threaded screw shank permits suitable adjustment of the Support 1l and through the latter of the contact vbar 10. lt willalso be noted that by this construction andarrangement the intermediate portion of the element 11 is offset with respect to the vertical axis of theplug 1 so as to provide for the proper positioning of the double contact element 17 which is supported thereby. This contact element is tions of apiece of spring metal inward upon the central portion thereby forming sprlng contact elements 18 and 19. These Contact elements 17 and 20are adapted to make oon-` tabt with the knife contacts 28 of the usual 105 knife plug such as 28a as will hereinafter appear. Another contact element 20, similar in construction to element 17 is supported irorn the lower end of the angular hanger element 21, the latter being secured in posi- 11o tion by engagement withthe rivet whlh likewise :tastens together the membersffand formed by bending the 'end por- 10o is capable of-carrying -vention are spaced and struction of the shell sections.

the various elements comprising my fl.' vWith regard to both of the double contact elements 17 and 20, their arrangement is sarl: that tlt'eir spring contact faces are properly spaced for engagement by the spaced arms ofthe usual plug, and it will be obvious from the foregoing description that the connections between the variousparts is such that current is carried for proper circuits to the plugs in use.

For enclosing, spacing and various parts heretofore described, I provide an insulating' shell or casing comprising` two similar sections 22 and 23. Each section of this shell isprovided with suit'- able registering central perforations for the reception of suitable fastening means such as bolts 2i. Likewise, cylindrical pockets 25 and 26 are provided socket member 6l and 7, it being understood that all irregular surfaces for seating the various parts of the device are formed similarly ineach half of ythe shell and in such al manner as to register when the shell sections are assembled. The registering grooves for accommodating the support and contact elements will be best seen from Fig. 2, and it will be noted in this figure that the various conductingelements of the ininsulated from each by the novel con- The shell sections 22 and 23 are perforated at 27 to form seats for the double contact elements 17 and 20 and likewise to provide a guideway for the knife contact elements 28 of a knife plug socket such as 28a. (See Fig. In this tigurewill also be clearly seen the arrangement of the double contacts and the engagement of the plug contact therewith.

From the foregoing description it will be seen that there is provided a device which from a single line knife plugs, and device are comparatively few in number andare arra @ed to be cheaply and conveniently and compactly assembled, and suitably insulated in a 'novel insulating casing "or shell. As various 'possible embodiments might b e other. wherever necessary two screw plugs and two `made of the above invention and as various changes might be made in the disclosures above set forth, it is to be 'understood that all matter herein set forth or shown in the accompanying drawings is as illustrative and not in a limiting sense.

Having thus described my invention. I claim as new and'desire to secure by Letters Patent 1. A multiway socket comprising a plug liaving a centra-l contact member and an insulating the' for the threaded to be interpreted outer shell, an integral extension depending from said shell, a stmporting arm fixed to said extension, a contact member carried by said support, a supporting arm carried by the central contacting member, a contact member carriedby the last mentioned supporting arm, and a sectional shell formed with apertures for the reception of said Contact members.

2. A multiway' socket comprising a plug of insulating material, a central contact member extending longitudinallyA therethrough, a threaded shell for said plug, a series of lips projecting from said shell and engaging the bottom of said plug, a pair of depending arms extending from said shell,

a pair of threaded sockets carried by saidl `flexible terminals, means for supporting said bar from the central contact ofsaid plug, double contact members arranged in spaced relation between the sockets and plug, one of said contact members being in circuit and supported by the central contact of said plug and the other of said contact members being in circuit and supported by said shell.

3. A multiway socket comprising a plug having a central contact member and a threaded external shell, screw sockets supported by and in'circuit with said shell, a common central contact member for said sockets,` a support for said contact member having an offset central portion, a doubie spring contact member fixed to the offset portion of said support, a lbracket fixed to said shell, a double Contact member carried by the lower extremity of said sockets and aninsulating casing member formed' "with .integral spacing extensions.

4. A multiway socket comprising a plug having a central Contact member extending therethrough and a threaded shell formed with spaced extensions, screw socket members providedwith spaced .extensions and having theirladjacent edges connected together, the spaced extensions on said threaded shell being connected to the extensions of said socket members, a support having an oH-set portion carried by the central contact member of said plug,-a central contact member for the sockets carried by said support, a contact member fixed to the offset portion of the support, a support fixed to one of the extensions a central contact member y of saidshell, and a' contact` carried by said A.

support.

MORRIS PROPP. 

